Guard for eyeglasses.



PATENTED MAY 14, 1907.

' D. -F. GREEN.

GUARD FOR EYEGLASSES. APPLIOATION FILED 0OT.26. 1906.

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I DALLAS F. GREEN, OF FORT WAYNE, INDIANA.

GUARD FOR EYEGLASSES.

Specification of Letters Patent.

Patented May 14. 1907.

Application filed October 25.1906. Serial No. 340,455.

To all whom it may concern.-

Be it known that I, DALLAS F. GREEN, a citizen of the United States,residing at Fort Wayne, in the county of Allen, in the State of Indiana,have invented certain new and useful Improvements in Guards forEyeglasses; and I do hereby declare that the following is a full, clear,and exact description of the invention, whichwill enable othersskilledin the art to which it appertains to make and use the same,reference being had to the accompanying drawings, which form part ofthis specification.

My invention relates to improvements in guards for eyeglasses.

It is well known that to secure eyeglasses in position-in use a pair ofcooperating lateral guards of some kind is required in addition to theregular bridge-spring; that on account of the wedge shape of the noseeither a sudden jar or astooping forward of the wearer starts apreliminary upward and loosening movement followed by a forward tiltingor displacement of the eyeglasses, in the eyeglass guards now in use;followed by a dropping of the same; and that the lateral pressure ofthese guards almost invariably causes con siderable irritation of theskin and conse quent discomfort.

The object, therefore, of my present invention is to provide an improvedeyeglass guard, of neat, simple and economical construction, adapted toavoid the usual irritation and discomfort by distributing the adhesivepressure over a larger area, and to more reliably secure the eyeglassesin position by bracing them against any upward movement in use.

My invention consists of an eyeglass guard to be used in duplicate incooperation with any suitable bridge-spring each guard consisting of asingle piece of flexible sheet metal sufficiently ductile to be readilybent in adjusting it to the desired shape, and yet sufficiently elasticto retain its shape under ordinary usage, having an unusual extension ofits length to distribute the irritating pressure, and to form a gentlebearing against the arch of the orbital cavity to prevent accidentalupward and forward displacement of the eyeglasses in stooping over andthe like. The guard also has a series of spaced perforations so arrangedas to increase 1ts adhesion in use, and to equalize its elasticity.

Similar reference numerals indicate like parts throughout the severalviews of the drawings in which Figure 1 is a front elevation of a pairof rim less eyeglasses of common form and proper mountings with myinvention in position thereon. Fig. 2 is an end perspective of the samein position upon the nose, showing the bearing of the upper end of theguard upon the orbital arch. Fig. 3 is an enlarged crosssection of Fig.1 taken on the line ac-a looking to the left showing the general contourof the guard, and the relative arrangement of the lateral aperturestherein. Fig. 4 is a fragmentary enlarged view of the same showing themanner of securing my invention in position thereon. Fig. 5 is a detailperspective of my improved guard showing the lateral shank by which itis rigidly secured to the mounting.

The eyeglasses upon which my invention is used may be of any properconstruction rimless or otherwise, with any desired lenses 1 having anyproper mountings 2, and any desired. form of bridge-spring 3.

The mountings shown have a pair of opposite studs or clamping posts 4fixed as usual upon the inner and adjacent ends of the lenses 1 in theusual manner. These studs have their adjacent faces vertically recessed,as shown at 5 in Fig. 4 to receive and secure the opposite ends of .thebridge-spring, and the shank of the guard about to be described.

The guard 6 is stamped in a single piece from proper sheet metal,preferably gold or silver, is approximately semicircular in contour islaterally apertured throughout its length, and is provided upon itsinner edge with a lateral shank 7 in vertical arrangement, and adaptedto be mounted in the recess 5 of the stud 4 and rigidly clamped thereinby means of the screw 8 whlch passes through the opening 9 of the shankand also through the flattened and apertured corresponding end 10 of thebridge-sfpring, Fig. 4.

The body of the guard 6 o spring-metal while sufficiently pliable topermit the operator to readily adjust it to any desired curvatures, isyet sufficiently elastic to preserve its shape and impart a properholding pressure in practical use. While this guard may be of anydesired contour in cross-section or laterally, and may be solid andplain instead of apertured, the body thereof preferably has its oppositeedges correspondingly scalloped, Fig. 5, and the portions includedbetween each pair of scallops are identically apertured, each beingprovidedwith three apertures, the central one IIO 1 1 of which is ofsufliciently greater diameter than the ones 12 on each side thereof tocor respond with the greater width and strength of the central part ofeach scalloped portion.

By this construction and arrangement of these apertures the strength andelasticity of the guard are substantially equalized. These aperturesperform the additional function of materially increasing the adhesivepower of the guard by the slight protrusion of the skin into the same inuse.

In use thefaces of the opposite ends of the guard are in differenthemispherical planes from those of the central portion and from eachother, as shown in Fig. 4 to fit the corresponding surfaces of the faceon which they bear.

The operation and manner of employing my invention is briefly statedsubstantially as follows: The opposite flattened and apertured ends ofthe bridge-spring 3 being first placed in the recess 5 of the companionstuds 4, the guards 6 are arranged adjacent to the inner face of thebridge-spring 3 with the shanks 7 thereof snugly fitted in the recess 5adjacent to the outer face of the corresponding flattened end of thebridge-spring, after which they are rigidly clamped and secured inposition by means of the screws 8 and the washers 13.

The relative arrangement of the shank 7 is such that when the companionguards 6 are thus secured in position they will stand in a slightlyoblique position relative to the inner face of the lenses, as shown,whereby the up per ends of the guards which are turned in oppositedirections and have substantially the curvature of the adjacent portionof the lenses, are adapted, when properly adjusted to fit below andgently bear against the orbital arch, as shown in Fig. 2. The lower endsof the guards will be slightly outwardly flaring to correspond to thesides of the nose on which they bear, but the lower half of the guardswill be in substantially a vertical position. By this construction andadjustment of the guards 6 they not only brace and support theeyeglasses downwardly and laterally, but also against any upwardmovement by which they are so frequently dismounted from the nose, aswhen the wearer momentarily assumes a stooping posture.

Having thus described. my invention and the manner of employing thesame, what I desire to secure by Letters Patent is:

1. In a guard for eyeglasses a pair of curved spring plates in verticalarrangemen t relative to their mountings, and having integral shanks insuch relation thereto that the lower ends thereof will functionate asnose guards, and the upper ends thereof will bear against the respectiveorbital arches; mountings for carrying the guards; and means for rigidlysecuring the guards in position.

2. A guard for eyeglasses consisting of a pair of cooperatingspring-metal plates having scalloped edges and a series of spacedperforations, the lower ends of the said plates being adapted tofunctionate as nose guards and their upper ends to bear upwardly againstthe orbital arch to brace the eyeglasses against an accidentaldisplacing upward movement thereof.

Signed by me at Fort ayne, Allen county, State of Indiana, this 23rd dayof October, A. D. 1906.

DALLAS F. GREEN.

Witnesses:

WATTS P. DENNY, AUGUSTA VIBERG.

